Answer :

Answer:

72

Step-by-step explanation:

Use the Pythagorean Theorem

29^2 = 20^2 + KN

841 = 400 + KN

441 = KN

KL = 75

75^2 = 441 + LN

5625 = 441 + LN

5184 = LN

Square root 5184 = 72

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